1 /* 2 * linux/fs/ufs/inode.c 3 * 4 * Copyright (C) 1998 5 * Daniel Pirkl <daniel.pirkl@email.cz> 6 * Charles University, Faculty of Mathematics and Physics 7 * 8 * from 9 * 10 * linux/fs/ext2/inode.c 11 * 12 * Copyright (C) 1992, 1993, 1994, 1995 13 * Remy Card (card@masi.ibp.fr) 14 * Laboratoire MASI - Institut Blaise Pascal 15 * Universite Pierre et Marie Curie (Paris VI) 16 * 17 * from 18 * 19 * linux/fs/minix/inode.c 20 * 21 * Copyright (C) 1991, 1992 Linus Torvalds 22 * 23 * Goal-directed block allocation by Stephen Tweedie (sct@dcs.ed.ac.uk), 1993 24 * Big-endian to little-endian byte-swapping/bitmaps by 25 * David S. Miller (davem@caip.rutgers.edu), 1995 26 */ 27 28 #include <asm/uaccess.h> 29 #include <asm/system.h> 30 31 #include <linux/errno.h> 32 #include <linux/fs.h> 33 #include <linux/time.h> 34 #include <linux/stat.h> 35 #include <linux/string.h> 36 #include <linux/mm.h> 37 #include <linux/smp_lock.h> 38 #include <linux/buffer_head.h> 39 #include <linux/writeback.h> 40 #include <linux/quotaops.h> 41 42 #include "ufs_fs.h" 43 #include "ufs.h" 44 #include "swab.h" 45 #include "util.h" 46 47 static u64 ufs_frag_map(struct inode *inode, sector_t frag); 48 49 static int ufs_block_to_path(struct inode *inode, sector_t i_block, sector_t offsets[4]) 50 { 51 struct ufs_sb_private_info *uspi = UFS_SB(inode->i_sb)->s_uspi; 52 int ptrs = uspi->s_apb; 53 int ptrs_bits = uspi->s_apbshift; 54 const long direct_blocks = UFS_NDADDR, 55 indirect_blocks = ptrs, 56 double_blocks = (1 << (ptrs_bits * 2)); 57 int n = 0; 58 59 60 UFSD("ptrs=uspi->s_apb = %d,double_blocks=%ld \n",ptrs,double_blocks); 61 if (i_block < direct_blocks) { 62 offsets[n++] = i_block; 63 } else if ((i_block -= direct_blocks) < indirect_blocks) { 64 offsets[n++] = UFS_IND_BLOCK; 65 offsets[n++] = i_block; 66 } else if ((i_block -= indirect_blocks) < double_blocks) { 67 offsets[n++] = UFS_DIND_BLOCK; 68 offsets[n++] = i_block >> ptrs_bits; 69 offsets[n++] = i_block & (ptrs - 1); 70 } else if (((i_block -= double_blocks) >> (ptrs_bits * 2)) < ptrs) { 71 offsets[n++] = UFS_TIND_BLOCK; 72 offsets[n++] = i_block >> (ptrs_bits * 2); 73 offsets[n++] = (i_block >> ptrs_bits) & (ptrs - 1); 74 offsets[n++] = i_block & (ptrs - 1); 75 } else { 76 ufs_warning(inode->i_sb, "ufs_block_to_path", "block > big"); 77 } 78 return n; 79 } 80 81 /* 82 * Returns the location of the fragment from 83 * the begining of the filesystem. 84 */ 85 86 static u64 ufs_frag_map(struct inode *inode, sector_t frag) 87 { 88 struct ufs_inode_info *ufsi = UFS_I(inode); 89 struct super_block *sb = inode->i_sb; 90 struct ufs_sb_private_info *uspi = UFS_SB(sb)->s_uspi; 91 u64 mask = (u64) uspi->s_apbmask>>uspi->s_fpbshift; 92 int shift = uspi->s_apbshift-uspi->s_fpbshift; 93 sector_t offsets[4], *p; 94 int depth = ufs_block_to_path(inode, frag >> uspi->s_fpbshift, offsets); 95 u64 ret = 0L; 96 __fs32 block; 97 __fs64 u2_block = 0L; 98 unsigned flags = UFS_SB(sb)->s_flags; 99 u64 temp = 0L; 100 101 UFSD(": frag = %llu depth = %d\n", (unsigned long long)frag, depth); 102 UFSD(": uspi->s_fpbshift = %d ,uspi->s_apbmask = %x, mask=%llx\n", 103 uspi->s_fpbshift, uspi->s_apbmask, 104 (unsigned long long)mask); 105 106 if (depth == 0) 107 return 0; 108 109 p = offsets; 110 111 lock_kernel(); 112 if ((flags & UFS_TYPE_MASK) == UFS_TYPE_UFS2) 113 goto ufs2; 114 115 block = ufsi->i_u1.i_data[*p++]; 116 if (!block) 117 goto out; 118 while (--depth) { 119 struct buffer_head *bh; 120 sector_t n = *p++; 121 122 bh = sb_bread(sb, uspi->s_sbbase + fs32_to_cpu(sb, block)+(n>>shift)); 123 if (!bh) 124 goto out; 125 block = ((__fs32 *) bh->b_data)[n & mask]; 126 brelse (bh); 127 if (!block) 128 goto out; 129 } 130 ret = (u64) (uspi->s_sbbase + fs32_to_cpu(sb, block) + (frag & uspi->s_fpbmask)); 131 goto out; 132 ufs2: 133 u2_block = ufsi->i_u1.u2_i_data[*p++]; 134 if (!u2_block) 135 goto out; 136 137 138 while (--depth) { 139 struct buffer_head *bh; 140 sector_t n = *p++; 141 142 143 temp = (u64)(uspi->s_sbbase) + fs64_to_cpu(sb, u2_block); 144 bh = sb_bread(sb, temp +(u64) (n>>shift)); 145 if (!bh) 146 goto out; 147 u2_block = ((__fs64 *)bh->b_data)[n & mask]; 148 brelse(bh); 149 if (!u2_block) 150 goto out; 151 } 152 temp = (u64)uspi->s_sbbase + fs64_to_cpu(sb, u2_block); 153 ret = temp + (u64) (frag & uspi->s_fpbmask); 154 155 out: 156 unlock_kernel(); 157 return ret; 158 } 159 160 /** 161 * ufs_inode_getfrag() - allocate new fragment(s) 162 * @inode - pointer to inode 163 * @fragment - number of `fragment' which hold pointer 164 * to new allocated fragment(s) 165 * @new_fragment - number of new allocated fragment(s) 166 * @required - how many fragment(s) we require 167 * @err - we set it if something wrong 168 * @phys - pointer to where we save physical number of new allocated fragments, 169 * NULL if we allocate not data(indirect blocks for example). 170 * @new - we set it if we allocate new block 171 * @locked_page - for ufs_new_fragments() 172 */ 173 static struct buffer_head * 174 ufs_inode_getfrag(struct inode *inode, u64 fragment, 175 sector_t new_fragment, unsigned int required, int *err, 176 long *phys, int *new, struct page *locked_page) 177 { 178 struct ufs_inode_info *ufsi = UFS_I(inode); 179 struct super_block *sb = inode->i_sb; 180 struct ufs_sb_private_info *uspi = UFS_SB(sb)->s_uspi; 181 struct buffer_head * result; 182 unsigned blockoff, lastblockoff; 183 u64 tmp, goal, lastfrag, block, lastblock; 184 void *p, *p2; 185 186 UFSD("ENTER, ino %lu, fragment %llu, new_fragment %llu, required %u, " 187 "metadata %d\n", inode->i_ino, (unsigned long long)fragment, 188 (unsigned long long)new_fragment, required, !phys); 189 190 /* TODO : to be done for write support 191 if ( (flags & UFS_TYPE_MASK) == UFS_TYPE_UFS2) 192 goto ufs2; 193 */ 194 195 block = ufs_fragstoblks (fragment); 196 blockoff = ufs_fragnum (fragment); 197 p = ufs_get_direct_data_ptr(uspi, ufsi, block); 198 199 goal = 0; 200 201 repeat: 202 tmp = ufs_data_ptr_to_cpu(sb, p); 203 204 lastfrag = ufsi->i_lastfrag; 205 if (tmp && fragment < lastfrag) { 206 if (!phys) { 207 result = sb_getblk(sb, uspi->s_sbbase + tmp + blockoff); 208 if (tmp == ufs_data_ptr_to_cpu(sb, p)) { 209 UFSD("EXIT, result %llu\n", 210 (unsigned long long)tmp + blockoff); 211 return result; 212 } 213 brelse (result); 214 goto repeat; 215 } else { 216 *phys = uspi->s_sbbase + tmp + blockoff; 217 return NULL; 218 } 219 } 220 221 lastblock = ufs_fragstoblks (lastfrag); 222 lastblockoff = ufs_fragnum (lastfrag); 223 /* 224 * We will extend file into new block beyond last allocated block 225 */ 226 if (lastblock < block) { 227 /* 228 * We must reallocate last allocated block 229 */ 230 if (lastblockoff) { 231 p2 = ufs_get_direct_data_ptr(uspi, ufsi, lastblock); 232 tmp = ufs_new_fragments(inode, p2, lastfrag, 233 ufs_data_ptr_to_cpu(sb, p2), 234 uspi->s_fpb - lastblockoff, 235 err, locked_page); 236 if (!tmp) { 237 if (lastfrag != ufsi->i_lastfrag) 238 goto repeat; 239 else 240 return NULL; 241 } 242 lastfrag = ufsi->i_lastfrag; 243 244 } 245 tmp = ufs_data_ptr_to_cpu(sb, 246 ufs_get_direct_data_ptr(uspi, ufsi, 247 lastblock)); 248 if (tmp) 249 goal = tmp + uspi->s_fpb; 250 tmp = ufs_new_fragments (inode, p, fragment - blockoff, 251 goal, required + blockoff, 252 err, 253 phys != NULL ? locked_page : NULL); 254 } else if (lastblock == block) { 255 /* 256 * We will extend last allocated block 257 */ 258 tmp = ufs_new_fragments(inode, p, fragment - 259 (blockoff - lastblockoff), 260 ufs_data_ptr_to_cpu(sb, p), 261 required + (blockoff - lastblockoff), 262 err, phys != NULL ? locked_page : NULL); 263 } else /* (lastblock > block) */ { 264 /* 265 * We will allocate new block before last allocated block 266 */ 267 if (block) { 268 tmp = ufs_data_ptr_to_cpu(sb, 269 ufs_get_direct_data_ptr(uspi, ufsi, block - 1)); 270 if (tmp) 271 goal = tmp + uspi->s_fpb; 272 } 273 tmp = ufs_new_fragments(inode, p, fragment - blockoff, 274 goal, uspi->s_fpb, err, 275 phys != NULL ? locked_page : NULL); 276 } 277 if (!tmp) { 278 if ((!blockoff && ufs_data_ptr_to_cpu(sb, p)) || 279 (blockoff && lastfrag != ufsi->i_lastfrag)) 280 goto repeat; 281 *err = -ENOSPC; 282 return NULL; 283 } 284 285 if (!phys) { 286 result = sb_getblk(sb, uspi->s_sbbase + tmp + blockoff); 287 } else { 288 *phys = uspi->s_sbbase + tmp + blockoff; 289 result = NULL; 290 *err = 0; 291 *new = 1; 292 } 293 294 inode->i_ctime = CURRENT_TIME_SEC; 295 if (IS_SYNC(inode)) 296 ufs_sync_inode (inode); 297 mark_inode_dirty(inode); 298 UFSD("EXIT, result %llu\n", (unsigned long long)tmp + blockoff); 299 return result; 300 301 /* This part : To be implemented .... 302 Required only for writing, not required for READ-ONLY. 303 ufs2: 304 305 u2_block = ufs_fragstoblks(fragment); 306 u2_blockoff = ufs_fragnum(fragment); 307 p = ufsi->i_u1.u2_i_data + block; 308 goal = 0; 309 310 repeat2: 311 tmp = fs32_to_cpu(sb, *p); 312 lastfrag = ufsi->i_lastfrag; 313 314 */ 315 } 316 317 /** 318 * ufs_inode_getblock() - allocate new block 319 * @inode - pointer to inode 320 * @bh - pointer to block which hold "pointer" to new allocated block 321 * @fragment - number of `fragment' which hold pointer 322 * to new allocated block 323 * @new_fragment - number of new allocated fragment 324 * (block will hold this fragment and also uspi->s_fpb-1) 325 * @err - see ufs_inode_getfrag() 326 * @phys - see ufs_inode_getfrag() 327 * @new - see ufs_inode_getfrag() 328 * @locked_page - see ufs_inode_getfrag() 329 */ 330 static struct buffer_head * 331 ufs_inode_getblock(struct inode *inode, struct buffer_head *bh, 332 u64 fragment, sector_t new_fragment, int *err, 333 long *phys, int *new, struct page *locked_page) 334 { 335 struct super_block *sb = inode->i_sb; 336 struct ufs_sb_private_info *uspi = UFS_SB(sb)->s_uspi; 337 struct buffer_head * result; 338 unsigned blockoff; 339 u64 tmp, goal, block; 340 void *p; 341 342 block = ufs_fragstoblks (fragment); 343 blockoff = ufs_fragnum (fragment); 344 345 UFSD("ENTER, ino %lu, fragment %llu, new_fragment %llu, metadata %d\n", 346 inode->i_ino, (unsigned long long)fragment, 347 (unsigned long long)new_fragment, !phys); 348 349 result = NULL; 350 if (!bh) 351 goto out; 352 if (!buffer_uptodate(bh)) { 353 ll_rw_block (READ, 1, &bh); 354 wait_on_buffer (bh); 355 if (!buffer_uptodate(bh)) 356 goto out; 357 } 358 if (uspi->fs_magic == UFS2_MAGIC) 359 p = (__fs64 *)bh->b_data + block; 360 else 361 p = (__fs32 *)bh->b_data + block; 362 repeat: 363 tmp = ufs_data_ptr_to_cpu(sb, p); 364 if (tmp) { 365 if (!phys) { 366 result = sb_getblk(sb, uspi->s_sbbase + tmp + blockoff); 367 if (tmp == ufs_data_ptr_to_cpu(sb, p)) 368 goto out; 369 brelse (result); 370 goto repeat; 371 } else { 372 *phys = uspi->s_sbbase + tmp + blockoff; 373 goto out; 374 } 375 } 376 377 if (block && (uspi->fs_magic == UFS2_MAGIC ? 378 (tmp = fs64_to_cpu(sb, ((__fs64 *)bh->b_data)[block-1])) : 379 (tmp = fs32_to_cpu(sb, ((__fs32 *)bh->b_data)[block-1])))) 380 goal = tmp + uspi->s_fpb; 381 else 382 goal = bh->b_blocknr + uspi->s_fpb; 383 tmp = ufs_new_fragments(inode, p, ufs_blknum(new_fragment), goal, 384 uspi->s_fpb, err, locked_page); 385 if (!tmp) { 386 if (ufs_data_ptr_to_cpu(sb, p)) 387 goto repeat; 388 goto out; 389 } 390 391 392 if (!phys) { 393 result = sb_getblk(sb, uspi->s_sbbase + tmp + blockoff); 394 } else { 395 *phys = uspi->s_sbbase + tmp + blockoff; 396 *new = 1; 397 } 398 399 mark_buffer_dirty(bh); 400 if (IS_SYNC(inode)) 401 sync_dirty_buffer(bh); 402 inode->i_ctime = CURRENT_TIME_SEC; 403 mark_inode_dirty(inode); 404 UFSD("result %llu\n", (unsigned long long)tmp + blockoff); 405 out: 406 brelse (bh); 407 UFSD("EXIT\n"); 408 return result; 409 } 410 411 /** 412 * ufs_getfrag_bloc() - `get_block_t' function, interface between UFS and 413 * readpage, writepage and so on 414 */ 415 416 int ufs_getfrag_block(struct inode *inode, sector_t fragment, struct buffer_head *bh_result, int create) 417 { 418 struct super_block * sb = inode->i_sb; 419 struct ufs_sb_private_info * uspi = UFS_SB(sb)->s_uspi; 420 struct buffer_head * bh; 421 int ret, err, new; 422 unsigned long ptr,phys; 423 u64 phys64 = 0; 424 425 if (!create) { 426 phys64 = ufs_frag_map(inode, fragment); 427 UFSD("phys64 = %llu\n", (unsigned long long)phys64); 428 if (phys64) 429 map_bh(bh_result, sb, phys64); 430 return 0; 431 } 432 433 /* This code entered only while writing ....? */ 434 435 err = -EIO; 436 new = 0; 437 ret = 0; 438 bh = NULL; 439 440 lock_kernel(); 441 442 UFSD("ENTER, ino %lu, fragment %llu\n", inode->i_ino, (unsigned long long)fragment); 443 if (fragment > 444 ((UFS_NDADDR + uspi->s_apb + uspi->s_2apb + uspi->s_3apb) 445 << uspi->s_fpbshift)) 446 goto abort_too_big; 447 448 err = 0; 449 ptr = fragment; 450 451 /* 452 * ok, these macros clean the logic up a bit and make 453 * it much more readable: 454 */ 455 #define GET_INODE_DATABLOCK(x) \ 456 ufs_inode_getfrag(inode, x, fragment, 1, &err, &phys, &new,\ 457 bh_result->b_page) 458 #define GET_INODE_PTR(x) \ 459 ufs_inode_getfrag(inode, x, fragment, uspi->s_fpb, &err, NULL, NULL,\ 460 bh_result->b_page) 461 #define GET_INDIRECT_DATABLOCK(x) \ 462 ufs_inode_getblock(inode, bh, x, fragment, \ 463 &err, &phys, &new, bh_result->b_page) 464 #define GET_INDIRECT_PTR(x) \ 465 ufs_inode_getblock(inode, bh, x, fragment, \ 466 &err, NULL, NULL, NULL) 467 468 if (ptr < UFS_NDIR_FRAGMENT) { 469 bh = GET_INODE_DATABLOCK(ptr); 470 goto out; 471 } 472 ptr -= UFS_NDIR_FRAGMENT; 473 if (ptr < (1 << (uspi->s_apbshift + uspi->s_fpbshift))) { 474 bh = GET_INODE_PTR(UFS_IND_FRAGMENT + (ptr >> uspi->s_apbshift)); 475 goto get_indirect; 476 } 477 ptr -= 1 << (uspi->s_apbshift + uspi->s_fpbshift); 478 if (ptr < (1 << (uspi->s_2apbshift + uspi->s_fpbshift))) { 479 bh = GET_INODE_PTR(UFS_DIND_FRAGMENT + (ptr >> uspi->s_2apbshift)); 480 goto get_double; 481 } 482 ptr -= 1 << (uspi->s_2apbshift + uspi->s_fpbshift); 483 bh = GET_INODE_PTR(UFS_TIND_FRAGMENT + (ptr >> uspi->s_3apbshift)); 484 bh = GET_INDIRECT_PTR((ptr >> uspi->s_2apbshift) & uspi->s_apbmask); 485 get_double: 486 bh = GET_INDIRECT_PTR((ptr >> uspi->s_apbshift) & uspi->s_apbmask); 487 get_indirect: 488 bh = GET_INDIRECT_DATABLOCK(ptr & uspi->s_apbmask); 489 490 #undef GET_INODE_DATABLOCK 491 #undef GET_INODE_PTR 492 #undef GET_INDIRECT_DATABLOCK 493 #undef GET_INDIRECT_PTR 494 495 out: 496 if (err) 497 goto abort; 498 if (new) 499 set_buffer_new(bh_result); 500 map_bh(bh_result, sb, phys); 501 abort: 502 unlock_kernel(); 503 return err; 504 505 abort_too_big: 506 ufs_warning(sb, "ufs_get_block", "block > big"); 507 goto abort; 508 } 509 510 static struct buffer_head *ufs_getfrag(struct inode *inode, 511 unsigned int fragment, 512 int create, int *err) 513 { 514 struct buffer_head dummy; 515 int error; 516 517 dummy.b_state = 0; 518 dummy.b_blocknr = -1000; 519 error = ufs_getfrag_block(inode, fragment, &dummy, create); 520 *err = error; 521 if (!error && buffer_mapped(&dummy)) { 522 struct buffer_head *bh; 523 bh = sb_getblk(inode->i_sb, dummy.b_blocknr); 524 if (buffer_new(&dummy)) { 525 memset(bh->b_data, 0, inode->i_sb->s_blocksize); 526 set_buffer_uptodate(bh); 527 mark_buffer_dirty(bh); 528 } 529 return bh; 530 } 531 return NULL; 532 } 533 534 struct buffer_head * ufs_bread (struct inode * inode, unsigned fragment, 535 int create, int * err) 536 { 537 struct buffer_head * bh; 538 539 UFSD("ENTER, ino %lu, fragment %u\n", inode->i_ino, fragment); 540 bh = ufs_getfrag (inode, fragment, create, err); 541 if (!bh || buffer_uptodate(bh)) 542 return bh; 543 ll_rw_block (READ, 1, &bh); 544 wait_on_buffer (bh); 545 if (buffer_uptodate(bh)) 546 return bh; 547 brelse (bh); 548 *err = -EIO; 549 return NULL; 550 } 551 552 static int ufs_writepage(struct page *page, struct writeback_control *wbc) 553 { 554 return block_write_full_page(page,ufs_getfrag_block,wbc); 555 } 556 557 static int ufs_readpage(struct file *file, struct page *page) 558 { 559 return block_read_full_page(page,ufs_getfrag_block); 560 } 561 562 int __ufs_write_begin(struct file *file, struct address_space *mapping, 563 loff_t pos, unsigned len, unsigned flags, 564 struct page **pagep, void **fsdata) 565 { 566 return block_write_begin(file, mapping, pos, len, flags, pagep, fsdata, 567 ufs_getfrag_block); 568 } 569 570 static int ufs_write_begin(struct file *file, struct address_space *mapping, 571 loff_t pos, unsigned len, unsigned flags, 572 struct page **pagep, void **fsdata) 573 { 574 *pagep = NULL; 575 return __ufs_write_begin(file, mapping, pos, len, flags, pagep, fsdata); 576 } 577 578 static sector_t ufs_bmap(struct address_space *mapping, sector_t block) 579 { 580 return generic_block_bmap(mapping,block,ufs_getfrag_block); 581 } 582 583 const struct address_space_operations ufs_aops = { 584 .readpage = ufs_readpage, 585 .writepage = ufs_writepage, 586 .sync_page = block_sync_page, 587 .write_begin = ufs_write_begin, 588 .write_end = generic_write_end, 589 .bmap = ufs_bmap 590 }; 591 592 static void ufs_set_inode_ops(struct inode *inode) 593 { 594 if (S_ISREG(inode->i_mode)) { 595 inode->i_op = &ufs_file_inode_operations; 596 inode->i_fop = &ufs_file_operations; 597 inode->i_mapping->a_ops = &ufs_aops; 598 } else if (S_ISDIR(inode->i_mode)) { 599 inode->i_op = &ufs_dir_inode_operations; 600 inode->i_fop = &ufs_dir_operations; 601 inode->i_mapping->a_ops = &ufs_aops; 602 } else if (S_ISLNK(inode->i_mode)) { 603 if (!inode->i_blocks) 604 inode->i_op = &ufs_fast_symlink_inode_operations; 605 else { 606 inode->i_op = &ufs_symlink_inode_operations; 607 inode->i_mapping->a_ops = &ufs_aops; 608 } 609 } else 610 init_special_inode(inode, inode->i_mode, 611 ufs_get_inode_dev(inode->i_sb, UFS_I(inode))); 612 } 613 614 static int ufs1_read_inode(struct inode *inode, struct ufs_inode *ufs_inode) 615 { 616 struct ufs_inode_info *ufsi = UFS_I(inode); 617 struct super_block *sb = inode->i_sb; 618 mode_t mode; 619 620 /* 621 * Copy data to the in-core inode. 622 */ 623 inode->i_mode = mode = fs16_to_cpu(sb, ufs_inode->ui_mode); 624 inode->i_nlink = fs16_to_cpu(sb, ufs_inode->ui_nlink); 625 if (inode->i_nlink == 0) { 626 ufs_error (sb, "ufs_read_inode", "inode %lu has zero nlink\n", inode->i_ino); 627 return -1; 628 } 629 630 /* 631 * Linux now has 32-bit uid and gid, so we can support EFT. 632 */ 633 inode->i_uid = ufs_get_inode_uid(sb, ufs_inode); 634 inode->i_gid = ufs_get_inode_gid(sb, ufs_inode); 635 636 inode->i_size = fs64_to_cpu(sb, ufs_inode->ui_size); 637 inode->i_atime.tv_sec = fs32_to_cpu(sb, ufs_inode->ui_atime.tv_sec); 638 inode->i_ctime.tv_sec = fs32_to_cpu(sb, ufs_inode->ui_ctime.tv_sec); 639 inode->i_mtime.tv_sec = fs32_to_cpu(sb, ufs_inode->ui_mtime.tv_sec); 640 inode->i_mtime.tv_nsec = 0; 641 inode->i_atime.tv_nsec = 0; 642 inode->i_ctime.tv_nsec = 0; 643 inode->i_blocks = fs32_to_cpu(sb, ufs_inode->ui_blocks); 644 inode->i_generation = fs32_to_cpu(sb, ufs_inode->ui_gen); 645 ufsi->i_flags = fs32_to_cpu(sb, ufs_inode->ui_flags); 646 ufsi->i_shadow = fs32_to_cpu(sb, ufs_inode->ui_u3.ui_sun.ui_shadow); 647 ufsi->i_oeftflag = fs32_to_cpu(sb, ufs_inode->ui_u3.ui_sun.ui_oeftflag); 648 649 650 if (S_ISCHR(mode) || S_ISBLK(mode) || inode->i_blocks) { 651 memcpy(ufsi->i_u1.i_data, &ufs_inode->ui_u2.ui_addr, 652 sizeof(ufs_inode->ui_u2.ui_addr)); 653 } else { 654 memcpy(ufsi->i_u1.i_symlink, ufs_inode->ui_u2.ui_symlink, 655 sizeof(ufs_inode->ui_u2.ui_symlink) - 1); 656 ufsi->i_u1.i_symlink[sizeof(ufs_inode->ui_u2.ui_symlink) - 1] = 0; 657 } 658 return 0; 659 } 660 661 static int ufs2_read_inode(struct inode *inode, struct ufs2_inode *ufs2_inode) 662 { 663 struct ufs_inode_info *ufsi = UFS_I(inode); 664 struct super_block *sb = inode->i_sb; 665 mode_t mode; 666 667 UFSD("Reading ufs2 inode, ino %lu\n", inode->i_ino); 668 /* 669 * Copy data to the in-core inode. 670 */ 671 inode->i_mode = mode = fs16_to_cpu(sb, ufs2_inode->ui_mode); 672 inode->i_nlink = fs16_to_cpu(sb, ufs2_inode->ui_nlink); 673 if (inode->i_nlink == 0) { 674 ufs_error (sb, "ufs_read_inode", "inode %lu has zero nlink\n", inode->i_ino); 675 return -1; 676 } 677 678 /* 679 * Linux now has 32-bit uid and gid, so we can support EFT. 680 */ 681 inode->i_uid = fs32_to_cpu(sb, ufs2_inode->ui_uid); 682 inode->i_gid = fs32_to_cpu(sb, ufs2_inode->ui_gid); 683 684 inode->i_size = fs64_to_cpu(sb, ufs2_inode->ui_size); 685 inode->i_atime.tv_sec = fs64_to_cpu(sb, ufs2_inode->ui_atime); 686 inode->i_ctime.tv_sec = fs64_to_cpu(sb, ufs2_inode->ui_ctime); 687 inode->i_mtime.tv_sec = fs64_to_cpu(sb, ufs2_inode->ui_mtime); 688 inode->i_atime.tv_nsec = fs32_to_cpu(sb, ufs2_inode->ui_atimensec); 689 inode->i_ctime.tv_nsec = fs32_to_cpu(sb, ufs2_inode->ui_ctimensec); 690 inode->i_mtime.tv_nsec = fs32_to_cpu(sb, ufs2_inode->ui_mtimensec); 691 inode->i_blocks = fs64_to_cpu(sb, ufs2_inode->ui_blocks); 692 inode->i_generation = fs32_to_cpu(sb, ufs2_inode->ui_gen); 693 ufsi->i_flags = fs32_to_cpu(sb, ufs2_inode->ui_flags); 694 /* 695 ufsi->i_shadow = fs32_to_cpu(sb, ufs_inode->ui_u3.ui_sun.ui_shadow); 696 ufsi->i_oeftflag = fs32_to_cpu(sb, ufs_inode->ui_u3.ui_sun.ui_oeftflag); 697 */ 698 699 if (S_ISCHR(mode) || S_ISBLK(mode) || inode->i_blocks) { 700 memcpy(ufsi->i_u1.u2_i_data, &ufs2_inode->ui_u2.ui_addr, 701 sizeof(ufs2_inode->ui_u2.ui_addr)); 702 } else { 703 memcpy(ufsi->i_u1.i_symlink, ufs2_inode->ui_u2.ui_symlink, 704 sizeof(ufs2_inode->ui_u2.ui_symlink) - 1); 705 ufsi->i_u1.i_symlink[sizeof(ufs2_inode->ui_u2.ui_symlink) - 1] = 0; 706 } 707 return 0; 708 } 709 710 struct inode *ufs_iget(struct super_block *sb, unsigned long ino) 711 { 712 struct ufs_inode_info *ufsi; 713 struct ufs_sb_private_info *uspi = UFS_SB(sb)->s_uspi; 714 struct buffer_head * bh; 715 struct inode *inode; 716 int err; 717 718 UFSD("ENTER, ino %lu\n", ino); 719 720 if (ino < UFS_ROOTINO || ino > (uspi->s_ncg * uspi->s_ipg)) { 721 ufs_warning(sb, "ufs_read_inode", "bad inode number (%lu)\n", 722 ino); 723 return ERR_PTR(-EIO); 724 } 725 726 inode = iget_locked(sb, ino); 727 if (!inode) 728 return ERR_PTR(-ENOMEM); 729 if (!(inode->i_state & I_NEW)) 730 return inode; 731 732 ufsi = UFS_I(inode); 733 734 bh = sb_bread(sb, uspi->s_sbbase + ufs_inotofsba(inode->i_ino)); 735 if (!bh) { 736 ufs_warning(sb, "ufs_read_inode", "unable to read inode %lu\n", 737 inode->i_ino); 738 goto bad_inode; 739 } 740 if ((UFS_SB(sb)->s_flags & UFS_TYPE_MASK) == UFS_TYPE_UFS2) { 741 struct ufs2_inode *ufs2_inode = (struct ufs2_inode *)bh->b_data; 742 743 err = ufs2_read_inode(inode, 744 ufs2_inode + ufs_inotofsbo(inode->i_ino)); 745 } else { 746 struct ufs_inode *ufs_inode = (struct ufs_inode *)bh->b_data; 747 748 err = ufs1_read_inode(inode, 749 ufs_inode + ufs_inotofsbo(inode->i_ino)); 750 } 751 752 if (err) 753 goto bad_inode; 754 inode->i_version++; 755 ufsi->i_lastfrag = 756 (inode->i_size + uspi->s_fsize - 1) >> uspi->s_fshift; 757 ufsi->i_dir_start_lookup = 0; 758 ufsi->i_osync = 0; 759 760 ufs_set_inode_ops(inode); 761 762 brelse(bh); 763 764 UFSD("EXIT\n"); 765 unlock_new_inode(inode); 766 return inode; 767 768 bad_inode: 769 iget_failed(inode); 770 return ERR_PTR(-EIO); 771 } 772 773 static void ufs1_update_inode(struct inode *inode, struct ufs_inode *ufs_inode) 774 { 775 struct super_block *sb = inode->i_sb; 776 struct ufs_inode_info *ufsi = UFS_I(inode); 777 778 ufs_inode->ui_mode = cpu_to_fs16(sb, inode->i_mode); 779 ufs_inode->ui_nlink = cpu_to_fs16(sb, inode->i_nlink); 780 781 ufs_set_inode_uid(sb, ufs_inode, inode->i_uid); 782 ufs_set_inode_gid(sb, ufs_inode, inode->i_gid); 783 784 ufs_inode->ui_size = cpu_to_fs64(sb, inode->i_size); 785 ufs_inode->ui_atime.tv_sec = cpu_to_fs32(sb, inode->i_atime.tv_sec); 786 ufs_inode->ui_atime.tv_usec = 0; 787 ufs_inode->ui_ctime.tv_sec = cpu_to_fs32(sb, inode->i_ctime.tv_sec); 788 ufs_inode->ui_ctime.tv_usec = 0; 789 ufs_inode->ui_mtime.tv_sec = cpu_to_fs32(sb, inode->i_mtime.tv_sec); 790 ufs_inode->ui_mtime.tv_usec = 0; 791 ufs_inode->ui_blocks = cpu_to_fs32(sb, inode->i_blocks); 792 ufs_inode->ui_flags = cpu_to_fs32(sb, ufsi->i_flags); 793 ufs_inode->ui_gen = cpu_to_fs32(sb, inode->i_generation); 794 795 if ((UFS_SB(sb)->s_flags & UFS_UID_MASK) == UFS_UID_EFT) { 796 ufs_inode->ui_u3.ui_sun.ui_shadow = cpu_to_fs32(sb, ufsi->i_shadow); 797 ufs_inode->ui_u3.ui_sun.ui_oeftflag = cpu_to_fs32(sb, ufsi->i_oeftflag); 798 } 799 800 if (S_ISCHR(inode->i_mode) || S_ISBLK(inode->i_mode)) { 801 /* ufs_inode->ui_u2.ui_addr.ui_db[0] = cpu_to_fs32(sb, inode->i_rdev); */ 802 ufs_inode->ui_u2.ui_addr.ui_db[0] = ufsi->i_u1.i_data[0]; 803 } else if (inode->i_blocks) { 804 memcpy(&ufs_inode->ui_u2.ui_addr, ufsi->i_u1.i_data, 805 sizeof(ufs_inode->ui_u2.ui_addr)); 806 } 807 else { 808 memcpy(&ufs_inode->ui_u2.ui_symlink, ufsi->i_u1.i_symlink, 809 sizeof(ufs_inode->ui_u2.ui_symlink)); 810 } 811 812 if (!inode->i_nlink) 813 memset (ufs_inode, 0, sizeof(struct ufs_inode)); 814 } 815 816 static void ufs2_update_inode(struct inode *inode, struct ufs2_inode *ufs_inode) 817 { 818 struct super_block *sb = inode->i_sb; 819 struct ufs_inode_info *ufsi = UFS_I(inode); 820 821 UFSD("ENTER\n"); 822 ufs_inode->ui_mode = cpu_to_fs16(sb, inode->i_mode); 823 ufs_inode->ui_nlink = cpu_to_fs16(sb, inode->i_nlink); 824 825 ufs_inode->ui_uid = cpu_to_fs32(sb, inode->i_uid); 826 ufs_inode->ui_gid = cpu_to_fs32(sb, inode->i_gid); 827 828 ufs_inode->ui_size = cpu_to_fs64(sb, inode->i_size); 829 ufs_inode->ui_atime = cpu_to_fs64(sb, inode->i_atime.tv_sec); 830 ufs_inode->ui_atimensec = cpu_to_fs32(sb, inode->i_atime.tv_nsec); 831 ufs_inode->ui_ctime = cpu_to_fs64(sb, inode->i_ctime.tv_sec); 832 ufs_inode->ui_ctimensec = cpu_to_fs32(sb, inode->i_ctime.tv_nsec); 833 ufs_inode->ui_mtime = cpu_to_fs64(sb, inode->i_mtime.tv_sec); 834 ufs_inode->ui_mtimensec = cpu_to_fs32(sb, inode->i_mtime.tv_nsec); 835 836 ufs_inode->ui_blocks = cpu_to_fs64(sb, inode->i_blocks); 837 ufs_inode->ui_flags = cpu_to_fs32(sb, ufsi->i_flags); 838 ufs_inode->ui_gen = cpu_to_fs32(sb, inode->i_generation); 839 840 if (S_ISCHR(inode->i_mode) || S_ISBLK(inode->i_mode)) { 841 /* ufs_inode->ui_u2.ui_addr.ui_db[0] = cpu_to_fs32(sb, inode->i_rdev); */ 842 ufs_inode->ui_u2.ui_addr.ui_db[0] = ufsi->i_u1.u2_i_data[0]; 843 } else if (inode->i_blocks) { 844 memcpy(&ufs_inode->ui_u2.ui_addr, ufsi->i_u1.u2_i_data, 845 sizeof(ufs_inode->ui_u2.ui_addr)); 846 } else { 847 memcpy(&ufs_inode->ui_u2.ui_symlink, ufsi->i_u1.i_symlink, 848 sizeof(ufs_inode->ui_u2.ui_symlink)); 849 } 850 851 if (!inode->i_nlink) 852 memset (ufs_inode, 0, sizeof(struct ufs2_inode)); 853 UFSD("EXIT\n"); 854 } 855 856 static int ufs_update_inode(struct inode * inode, int do_sync) 857 { 858 struct super_block *sb = inode->i_sb; 859 struct ufs_sb_private_info *uspi = UFS_SB(sb)->s_uspi; 860 struct buffer_head * bh; 861 862 UFSD("ENTER, ino %lu\n", inode->i_ino); 863 864 if (inode->i_ino < UFS_ROOTINO || 865 inode->i_ino > (uspi->s_ncg * uspi->s_ipg)) { 866 ufs_warning (sb, "ufs_read_inode", "bad inode number (%lu)\n", inode->i_ino); 867 return -1; 868 } 869 870 bh = sb_bread(sb, ufs_inotofsba(inode->i_ino)); 871 if (!bh) { 872 ufs_warning (sb, "ufs_read_inode", "unable to read inode %lu\n", inode->i_ino); 873 return -1; 874 } 875 if (uspi->fs_magic == UFS2_MAGIC) { 876 struct ufs2_inode *ufs2_inode = (struct ufs2_inode *)bh->b_data; 877 878 ufs2_update_inode(inode, 879 ufs2_inode + ufs_inotofsbo(inode->i_ino)); 880 } else { 881 struct ufs_inode *ufs_inode = (struct ufs_inode *) bh->b_data; 882 883 ufs1_update_inode(inode, ufs_inode + ufs_inotofsbo(inode->i_ino)); 884 } 885 886 mark_buffer_dirty(bh); 887 if (do_sync) 888 sync_dirty_buffer(bh); 889 brelse (bh); 890 891 UFSD("EXIT\n"); 892 return 0; 893 } 894 895 int ufs_write_inode(struct inode *inode, struct writeback_control *wbc) 896 { 897 int ret; 898 lock_kernel(); 899 ret = ufs_update_inode(inode, wbc->sync_mode == WB_SYNC_ALL); 900 unlock_kernel(); 901 return ret; 902 } 903 904 int ufs_sync_inode (struct inode *inode) 905 { 906 return ufs_update_inode (inode, 1); 907 } 908 909 void ufs_delete_inode (struct inode * inode) 910 { 911 loff_t old_i_size; 912 913 if (!is_bad_inode(inode)) 914 dquot_initialize(inode); 915 916 truncate_inode_pages(&inode->i_data, 0); 917 if (is_bad_inode(inode)) 918 goto no_delete; 919 /*UFS_I(inode)->i_dtime = CURRENT_TIME;*/ 920 lock_kernel(); 921 mark_inode_dirty(inode); 922 ufs_update_inode(inode, IS_SYNC(inode)); 923 old_i_size = inode->i_size; 924 inode->i_size = 0; 925 if (inode->i_blocks && ufs_truncate(inode, old_i_size)) 926 ufs_warning(inode->i_sb, __func__, "ufs_truncate failed\n"); 927 ufs_free_inode (inode); 928 unlock_kernel(); 929 return; 930 no_delete: 931 clear_inode(inode); /* We must guarantee clearing of inode... */ 932 } 933